EP0081121A1 - Spring tine - Google Patents
Spring tine Download PDFInfo
- Publication number
- EP0081121A1 EP0081121A1 EP82110700A EP82110700A EP0081121A1 EP 0081121 A1 EP0081121 A1 EP 0081121A1 EP 82110700 A EP82110700 A EP 82110700A EP 82110700 A EP82110700 A EP 82110700A EP 0081121 A1 EP0081121 A1 EP 0081121A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- leaf
- spring leaf
- cross
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003754 machining Methods 0.000 claims abstract description 7
- 238000003971 tillage Methods 0.000 claims abstract description 3
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 4
- 229910000639 Spring steel Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
- A01B35/20—Tools; Details
- A01B35/22—Non-rotating tools; Resilient or flexible mounting of rigid tools
- A01B35/24—Spring tools
Definitions
- the invention relates to a spring tine for agricultural implements for tillage, such as harrows, cultivators or the like, with a curved spring leaf, the upper end of which is designed as a fastening point for releasable fastening to the device and the lower end with a carrier for the attachment of a Processing part, such as Eggenspitze, coulter or the like., Detachably or non-detachably connected.
- An agricultural implement for soil cultivation equipped with spring tines is pulled over the ground with the help of a tractor.
- the machining parts take hold the spring tines into the soil and loosen it up.
- the tines deforms by means of its leaf spring elastic. The machining part can then avoid the obstacle.
- a spring tine of the type mentioned is known.
- the spring leaf of this spring tine has a constant cross-section over its length, which is almost rectangular with two parallel long sides and two opposite short sides.
- the disadvantage of this known spring tine is that its spring leaf with the constant cross section is poorly utilized in terms of tension.
- the point of greatest tension is located in the cross-section furthest away from the point of force application in the ground, since the bending moment is known to be composed of force times lever arm.
- this uppermost cross-section is the point of maximum tension and therefore the point at which.
- the spring leaf is most at risk of breakage.
- the known spring tines in order to reduce the risk of breakage, there is only the possibility of strengthening the spring leaf by a second spring leaf or increasing the constant thickness of the spring leaf as a whole, which, however, results in poor material utilization of the spring steel.
- the invention is based on the object of further developing the spring tines in such a way that in the mainly spring-acting part almost the same tension occurs in all cross sections as a function of the variable spring force, in order to obtain a good material utilization of the spring material and to reduce the risk of breakage of the spring leaf.
- the spring leaf has a cross-section which is variable over its length, the axial area moment of inertia I of the cross-section, divided by half the leaf thickness, being proportional to the distance 1 of the cross-section from the line of action of the spring force F.
- the spring leaf preferably has a leaf thickness that is variable over its length with a constant leaf width. However, it can also have a sheet width which is variable over its length with a constant sheet thickness.
- the sheet thickness or sheet width profile which is variable over the length of the spring sheet, is advantageously produced by non-cutting or cutting shaping. Rolling is advantageously provided for the non-cutting shaping.
- the spring tine according to FIG. 1 is made in one piece from a spring leaf 10 and a carrier 11 for a machining part 12 to be attached.
- the spring leaf 10 is located in the upper region, its upper end 13 is rolled up and has a bore 14 through which a fastening screw for fastening the spring tine to a supporting beam of the device can be inserted.
- the spring leaf 10 consists of a spring steel of constant width and thickness variable over the length. It is bent in one direction and merges with its lower end 15 at a turning point into the beam 11 bent in the other direction.
- the carrier is folded. It is also possible to use straps that are not folded.
- the processing part 12 is detachably attached. This engages in the ground, so that the resulting spring force acts here along an action line 17 at the point of application 18.
- the cross-section which is variable over the length of the spring leaf 10 or, since the width of the spring leaf 10 is constant, the variable thickness changes with the distance of the cross-section from the line of action 17 of the resulting spring force in accordance with the mechanical laws. In this way, the same stress results in all cross-sections of the spring leaf 10 during springing, so that there is no longer a point of greatest stress, which the known spring has in its cross-section which is furthest away from the line of action of the spring force, in the spring according to the invention .
- the design of the spring leaf 10 according to the invention therefore results in particularly good material utilization of the spring steel.
- the spring tine according to FIG. 2 of the drawing is basically constructed the same way. However, it is made divided in the area of the turning point 16 at the lower end 15 of the spring leaf 10, so that there is the part carrier 11 in addition to the part spring leaf 10. These two parts are detachably fastened to one another by means of screws 19.
- the spring tine according to FIG. 3 of the drawing is made in one piece with its spring leaf 20 and the carrier 21 adjoining the lower end of the spring leaf for the machining part 12.
- the spring leaf 20 begins with its upper end 22, at which the bore 14 for attachment to the support beam is located, with a horizontal course, is then curved in one direction to the lower end 23, where the carrier 21 is in the same direction connects curved course and reaches with its lower end with the point of application 18 of the spring force in the region of the line of action 17.
- the upper end 22 of the spring leaf 20 can be attached to the supporting beam in a resilient manner.
- the spring tine according to FIGS. 4 and 5 of the drawing has a spring leaf 10a, which is not variable in its thickness and constant in width, like the spring leaf according to FIG. 1, but which has a variable leaf width and a constant leaf thickness.
- a spring leaf with an exactly rectangular cross-section is used here, but with a cross-section designed with rounded narrow sides, for example according to DIN 59 145. This avoids the notch effects usually emanating from sharp edges.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
- Springs (AREA)
- Cultivation Of Plants (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
Bei einem Federzinken für landwirtschaftliche Geräte zur Bodenbearbeitung, wie Eggen, Grubber o. dgl., mit einem gebogenen Federblatt (10), dessen oberes Ende als Befestigungsstelle für die lösbare Befestigung an dem Gerät ausgebildet ist und dessen unteres Ende mit einem Träger (11) für die Anbringung eines Bearbeitungsteils (12), wie Eggenspitze, Schar o. dgl., lösbar oder unlösbar verbunden ist, weist das Federblatt (10) einen über seine Länge veränderlichen Querschnitt auf, wobei das axiale Flächenträgheitsmoment I des Querschnitts, geteilt durch die halbe Blattdicke h, proportional dem Abstand 1 des Querschnitts von der Wirkungslinie (17) der Federkraft ist. Auf diese Weise ergibt sich während des federnden Auslenkens des Federblattes (10) in allen Querschnitten nahezu dieselbe Spannung, so daß eine gute Materialausnutzung erzielt und die Bruchgefahr verringert wird.In the case of a spring tine for agricultural implements for tillage, such as harrows, cultivators or the like, with a curved spring leaf (10), the upper end of which is designed as a fastening point for releasable fastening to the implement and the lower end of which is carried by a carrier (11) for the attachment of a machining part (12), such as egg tip, coulter or the like, detachably or non-detachably connected, the spring leaf (10) has a cross section which is variable over its length, the axial area moment of inertia I of the cross section being divided by half Sheet thickness h, proportional to the distance 1 of the cross section from the line of action (17) of the spring force. This results in almost the same tension in all cross sections during the resilient deflection of the spring leaf (10), so that good material utilization is achieved and the risk of breakage is reduced.
Description
Die Erfindung betrifft einen Federzinken für landwirtschaftliche Geräte zur Bodenbearbeitung, wie Eggen, Grubber o. dgl., mit einem gebogenen Federblatt, dessen oberes Ende als Befestigungsstelle für die lösbare Befestigung an dem Gerät ausgebildet ist und dessen unteres Ende mit einem Träger für die Anbringung eines Bearbeitungsteils, wie Eggenspitze, Schar o. dgl., lösbar oder unlösbar verbunden ist.The invention relates to a spring tine for agricultural implements for tillage, such as harrows, cultivators or the like, with a curved spring leaf, the upper end of which is designed as a fastening point for releasable fastening to the device and the lower end with a carrier for the attachment of a Processing part, such as Eggenspitze, coulter or the like., Detachably or non-detachably connected.
Ein mit Federzinken ausgerüstetes landwirtschaftliches Gerät zur Bodenbearbeitung wird mit Hilfe eines Schleppers über den Boden gezogen. Dabei greifen die Bearbeitungsteile der Federzinken in den Boden ein und lockern diesen auf. Wenn ein Bearbeitungsteil auf ein festes Hindernis im Bo-den auftrifft, verformt sich der Federzinken mit Hilfe seines Federblattes elastisch. Das Bearbeitungsteil kann dann dem Hindernis ausweichen.An agricultural implement for soil cultivation equipped with spring tines is pulled over the ground with the help of a tractor. The machining parts take hold the spring tines into the soil and loosen it up. When a machining part hits a solid obstacle in the B o, the tines deforms by means of its leaf spring elastic. The machining part can then avoid the obstacle.
Aus der DE-AS 17 57 146 ist ein Federzinken der eingangs genannten Art bekannt. Das Federblatt dieses Federzinkens hat einen über die Länge konstanten Querschnitt, der mit zwei parallelen Langseiten und mit zwei gegenüberliegenden Kurzseiten nahezu rechteckig ist. Der Nachteil dieses bekannten Federzinkens besteht darin, daß sein Federblatt mit dem konstanten Querschnitt spannungsmäßig schlecht ausgenutzt ist. Bei einer Auslenkung des Federzinkens entstehen längs des Federblattes unterschiedliche Spannungen, da längs des Federblättes unterschiedliche Biegemomente auftreten. Die Stelle größter Spannung befindet sich in dem am weitesten vom Kraftangriffspunkt im Boden entfernten Querschnitt, da das Biegemoment bekanntlich aus Kraft mal Hebelarm zusammengesetzt ist. Bei einem Federblatt mit konstantem Querschnitt ist also dieser oberste Querschnitt die Stelle maximaler Spannung und damit die Stelle, an der. das Federblatt am stärksten bruchgefährdet ist. Bei den bekannten Federzinken besteht, um die Bruchgefahr zu vermindern, nur die Möglichkeit, das Federblatt durch ein zweites Federblatt zu verstärken oder die konstante Dicke des Federblattes im ganzen zu vergrößern, was aber eine schlechte Materialausnutzung des Federstahls zur Folge hat.From DE-AS 17 57 146 a spring tine of the type mentioned is known. The spring leaf of this spring tine has a constant cross-section over its length, which is almost rectangular with two parallel long sides and two opposite short sides. The disadvantage of this known spring tine is that its spring leaf with the constant cross section is poorly utilized in terms of tension. When the spring tine is deflected, different stresses arise along the spring leaf, since different bending moments occur along the spring leaf. The point of greatest tension is located in the cross-section furthest away from the point of force application in the ground, since the bending moment is known to be composed of force times lever arm. In the case of a spring leaf with a constant cross-section, this uppermost cross-section is the point of maximum tension and therefore the point at which. the spring leaf is most at risk of breakage. In the known spring tines, in order to reduce the risk of breakage, there is only the possibility of strengthening the spring leaf by a second spring leaf or increasing the constant thickness of the spring leaf as a whole, which, however, results in poor material utilization of the spring steel.
Der Erfindung liegt die Aufgabe zugrunde, den Federzinken so weiterzuentwickeln, daß im hauptsächlich federungswirksamen Teil in allen Querschnitten nahezu dieselbe Spannung in Abhängigkeit von der veränderlichen Federkraft auftritt, um eine gute Materialausnutzung des Federwerkstoffes zu erhalten und die Bruchgefahr des Federblattes zu verringern.The invention is based on the object of further developing the spring tines in such a way that in the mainly spring-acting part almost the same tension occurs in all cross sections as a function of the variable spring force, in order to obtain a good material utilization of the spring material and to reduce the risk of breakage of the spring leaf.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Federblatt einen über seine Länge veränderlichen Querschnitt aufweist, wobei das axiale Flächenträgheitsmoment I des Querschnitts, geteilt durch die halbe Blattdicke, proportional dem Abstand 1 des Querschnitts von der Wirkungslinie der Federkraft F ist.This object is achieved in that the spring leaf has a cross-section which is variable over its length, the axial area moment of inertia I of the cross-section, divided by half the leaf thickness, being proportional to the distance 1 of the cross-section from the line of action of the spring force F.
Das Federblatt weist bevorzugt eine über seine Länge veränderliche Blattdicke bei konstanter Blattbreite auf. Es kann aber auch eine über seine Länge veränderliche Blattbreite bei konstanter Blattdicke haben.The spring leaf preferably has a leaf thickness that is variable over its length with a constant leaf width. However, it can also have a sheet width which is variable over its length with a constant sheet thickness.
Vorteilhaft ist der über die Länge des Federblattes veränderliche Blattdicken- bzw. Blattbreitenverlauf durch spanlose oder spanende Formgebung hergestellt. Für die spanlose Formgebung ist dabei vorteilhaft das Auswalzen vorgesehen.The sheet thickness or sheet width profile, which is variable over the length of the spring sheet, is advantageously produced by non-cutting or cutting shaping. Rolling is advantageously provided for the non-cutting shaping.
Da die Spannung und somit auch die Verformung des Federblattes im hauptsächlich federungswirksamen Bereich annähernd konstant sind, lassen sich das elastische Verförmungsvermögen und die Lebensdauer des Federzinkens durch ein gezieltes Vorverformen in Richtung seiner späteren Belastung über die Fließgrenze des Werkstoffs hinaus wesentlich steigern. Dieser Vorgang ist in der Fachliteratur unter dem Namen "Vorsetzen" bekannt.Since the tension and thus the deformation of the spring leaf are almost constant in the mainly spring-effective area, the elastic deformability and the service life of the spring tine can be significantly increased by targeted pre-deformation in the direction of its later loading beyond the yield point of the material. This process is known in the specialist literature under the name "Voretzen".
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen:
- Fig. 1 eine Seitenansicht eines Federzinkens, dessen Federblatt eine über die Länge veränderliche Blattdicke bei konstanter Blattbreite aufweist und mit dem Träger einstückig ausgeführt ist;
- Fig. 2 eine Seitenansicht des Federzinkens gemäß Fig. 1, wobei jedoch der Träger und das Federblatt durch Verschraubung miteinander verbunden sind;
- Fig. 3 eine Seitenansicht eines Federblattes mit über die Länge veränderlicher Blattdicke bei konstanter Blattbreite in einstückiger Ausführung mit dem in gleicher Richtung wie das Federblatt gekrümmten Träger;
- Fig. 4 eine Seitenansicht eines Federblattes gemäß Fig. 1, bei welchem nicht die Blattdicke, sondern die Blattbreite über die Länge veränderlich ist;
- Fig. 5 eine Vorderansicht des Federzinkens gemäß Fig. 4;
- Fig. 6 eine schematische Seitenansicht eines Federzinkens mit Maßlinien für die Berechnung von Federblattdicke und Federblattbreite.
- 1 shows a side view of a spring tine, the spring leaf of which has a leaf thickness which is variable over the length with a constant leaf width and is made in one piece with the carrier;
- FIG. 2 shows a side view of the spring tine according to FIG. 1, but the carrier and the spring leaf are connected to one another by screwing;
- 3 shows a side view of a spring leaf with a leaf thickness which is variable over the length with a constant leaf width in a one-piece design with the support curved in the same direction as the spring leaf;
- 4 shows a side view of a spring leaf according to FIG. 1, in which not the leaf thickness but the leaf width is variable over the length;
- FIG. 5 shows a front view of the spring tine according to FIG. 4;
- Fig. 6 is a schematic side view of a spring tine with dimension lines for the calculation of spring leaf thickness and spring leaf width.
Der Federzinken gemäß Fig. 1 ist einstückig aus einem Federblatt 10 und einem Träger 11 für ein anzubringendes Be- arbeitungsteil 12 ausgebildet. Das Federblatt 10 befindet sich im oberen Bereich, sein oberes Ende 13 ist eingerollt und weist eine Bohrung 14 auf, durch welche eine Befestigungsschraube zum Befestigen des Federzinkens an einem Tragbalken des Gerätes hindurchgesteckt werden kann. Das Federblatt 10 besteht aus einem Federstahl konstanter Breite und über die Länge veränderlicher Dicke. Es ist in einer Richtung gebogen und geht mit seinem unteren Ende 15 in einem Wendepunkt in den in der anderen Richtung gebogenen Träger 11 über. Im Ausführungsbeispiel ist der Träger gefaltet. Es ist auch möglich, Träger zu verwenden, die nicht gefaltet sind.The spring tine according to FIG. 1 is made in one piece from a
Am unteren Ende des Trägers 11 ist das Bearbeitungsteil 12 lösbar angebracht. Dieses greift in den Boden ein, so daß hier längs einer Wirkungslinie 17 im Angriffspunkt 18 die resultierende Federkraft angreift. Der über die Länge des Federblattes 10 veränderliche Querschnitt oder, da die Breite des Federblattes 10 konstant ist, die veränderliche Dicke ändert sich mit dem Abstand des Querschnitts von der Wirkungslinie 17 der resultierenden Federkraft entsprechend den mechanischen Gesetzen. Auf diese Weise ergibt sich in allen Querschnitten des Federblattes 10 während des Federns die gleiche Beanspruchung, so daß es eine Stelle größter Beanspruchung, welche die vorbekannte Feder in ihrem von der Wirkungslinie der Federkraft am weitesten entfernten Querschnitt hat, bei der erfindungsgemäßen Feder nicht mehr gibt. Die erfindungsgemäße Ausbildung des Federblattes 10 hat daher eine besonders gute Materialausnutzung des Federstahls zur Folge.At the lower end of the
Der Federzinken gemäß Fig. 2 der Zeichnung ist grundsätzlich genauso aufgebaut. Er ist jedoch im Bereich des Wendepunktes 16 am unteren Ende 15 des Federblattes 10 geteilt ausgeführt, so daß es außer dem Teil Federblatt 10 das Teil Träger 11 gibt. Diese beiden Teile sind mit Hilfe von Schrauben 19 lösbar aneinander befestigt.The spring tine according to FIG. 2 of the drawing is basically constructed the same way. However, it is made divided in the area of the
Der Federzinken gemäß Fig. 3 der Zeichnung ist mit seinem Federblatt 20 und dem am unteren Ende des Federblattes angrenzenden Träger 21 für das Bearbeitungsteil 12 einstückig ausgeführt. Das Federblatt 20 beginnt mit seinem oberen Ende 22, an dem sich die Bohrung 14 zum Befestigen an dem Tragbalken befindet, mit einem waagerechten Verlauf, ist dann in einer Richtung gekrümmt bis zum unteren Ende 23, wo sich der Träger 21 mit einem in derselben Richtung gekrümmten Verlauf anschließt und mit seinem unteren Ende mit dem Angriffspunkt 18 der Federkraft in den Bereich der Wirkungslinie 17 gelangt. Die Befestigung des Federblattes 20 mit seinem oberen Ende 22 an dem Tragbalken kann federnd erfolgen.The spring tine according to FIG. 3 of the drawing is made in one piece with its
Der Federzinken gemäß Fig. 4 und 5 der Zeichnung weist ein Federblatt 10a auf, welches nicht in seiner Dicke veränderlich und in seiner Breite konstant ist, wie das Federblatt gemäß Fig. 1, sondern welches eine veränderliche Blattbreite und eine konstante Blattdicke hat. Außerdem wird hier nicht ein Federblatt mit exakt rechteckigem Querschnitt, sondern mit einem mit abgerundeten Schmalseiten ausgeführten Querschnitt, beispielsweise nach DIN 59 145 verwendet. Dadurch werden die von scharfen Kanten üblicherweise ausgehenden Kerbwirkungen vermieden.The spring tine according to FIGS. 4 and 5 of the drawing has a spring leaf 10a, which is not variable in its thickness and constant in width, like the spring leaf according to FIG. 1, but which has a variable leaf width and a constant leaf thickness. In addition, a spring leaf with an exactly rectangular cross-section is used here, but with a cross-section designed with rounded narrow sides, for example according to DIN 59 145. This avoids the notch effects usually emanating from sharp edges.
In der schematischen Darstellung gemäß Fig. 6 der Zeichnung ist F die Federkraft, 1 die Länge des Abstandes eines bev stimmten Federblattquerschnitts von der Wirkungslinie 17 der Federkraft und h die Blattdicke in diesem Federblattquerschnitt. Für die Biegespannung gilt die Gleichung
- Hierin ist M = Biegemoment,
- W = Widerstandsmoment
- und I = axiales Flächenträgheitsmoment des Federblattquerschnitts.
- Where M = bending moment,
- W = section modulus
- and I = axial area moment of inertia of the spring leaf cross section.
Für das Widerstandsmoment gilt die Gleichung
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT82110700T ATE14820T1 (en) | 1981-12-05 | 1982-11-19 | SPRING TINES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813148260 DE3148260A1 (en) | 1981-12-05 | 1981-12-05 | SPRING TINE |
| DE3148260 | 1981-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0081121A1 true EP0081121A1 (en) | 1983-06-15 |
| EP0081121B1 EP0081121B1 (en) | 1985-08-14 |
Family
ID=6148019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82110700A Expired EP0081121B1 (en) | 1981-12-05 | 1982-11-19 | Spring tine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4534418A (en) |
| EP (1) | EP0081121B1 (en) |
| AT (1) | ATE14820T1 (en) |
| CA (1) | CA1197129A (en) |
| DE (2) | DE3148260A1 (en) |
| DK (1) | DK534782A (en) |
| ES (1) | ES517918A0 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3504779A1 (en) * | 1985-02-13 | 1986-08-21 | Krupp Brüninghaus GmbH, 5980 Werdohl | SPRING TINK AND METHOD FOR THE PRODUCTION THEREOF |
| CA1245905A (en) * | 1985-03-08 | 1988-12-06 | Leon Malinowski | Cultivator shank |
| US5181668A (en) * | 1987-09-07 | 1993-01-26 | Osaka Gas Co., Ltd. | Apparatus for running a wire through a pipe |
| US5027907A (en) * | 1990-03-28 | 1991-07-02 | Garth Delyea | Replacement tips for spring harrows |
| US6425446B1 (en) * | 2000-08-17 | 2002-07-30 | Michael Gates | Harrow tine with a cutting edge |
| NZ531359A (en) * | 2004-02-24 | 2005-12-23 | Thian Agri Mfg Ltd | Tine for a soil cultivating apparatus |
| FR2872994B1 (en) * | 2004-07-16 | 2007-11-02 | Gregoire Besson Et Cie Sa Ets | CULTIVATOR TOOTH FOR CHASSIS TOOTH WORK TOOL |
| NZ535219A (en) * | 2004-09-09 | 2005-12-23 | Tomorrow S Innovations Ltd | Improved coulter for seed drill |
| US20130061569A1 (en) * | 2010-11-03 | 2013-03-14 | Dean J. McClenathen | Device for flattening corn stalk stubbles |
| DE102012022582B8 (en) * | 2012-11-20 | 2014-05-22 | Franz Greisbach | Method for producing a spring tine and spring tines |
| DE202012011077U1 (en) | 2012-11-20 | 2013-03-25 | Franz Greisbach | tines |
| USD857756S1 (en) * | 2017-08-02 | 2019-08-27 | China Pacificarbide, Inc. | Tine attachment |
| USD857760S1 (en) * | 2017-08-02 | 2019-08-27 | China Pacificarbide, Inc. | Tine attachment |
| USD859477S1 (en) * | 2017-08-02 | 2019-09-10 | China Pacificarbide, Inc. | Tine attachment |
| USD857757S1 (en) * | 2017-08-02 | 2019-08-27 | China Pacificarbide, Inc. | Tine attachment |
| USD857758S1 (en) * | 2017-08-02 | 2019-08-27 | China Pacificarbide, Inc. | Tine attachment |
| USD859476S1 (en) * | 2017-08-02 | 2019-09-10 | China Pacificarbide, Inc. | Tine attachment |
| USD857759S1 (en) * | 2017-08-02 | 2019-08-27 | China Pacificarbide, Inc. | Tine attachment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE6941324U (en) * | 1969-10-22 | 1970-03-19 | Heinrich Weiste & Co Gmbh Fa | SPRING TINE |
| DE7212348U (en) * | 1972-04-01 | 1972-06-29 | Rau Ohg | SOIL WORKING TOOL |
| DE7320747U (en) * | 1973-06-02 | 1973-11-22 | Steimel L | SPRING SOIL TREATMENT TOOL |
| DE1757146B2 (en) * | 1967-05-05 | 1976-07-29 | Kongskilde Koncernselskab A/S, Soroe (Dänemark) | SPRING EGG TINE |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US327340A (en) * | 1885-09-29 | Spring harrow-tooth | ||
| US2707909A (en) * | 1950-11-07 | 1955-05-10 | Henry J Ampe | Two-row weeder attachment |
| US2627798A (en) * | 1951-08-27 | 1953-02-10 | William T Graham | Clamp for vibrating shank plows |
| US2772615A (en) * | 1952-11-29 | 1956-12-04 | Calkins Mfg Company | Reversible disc plow |
| US3157234A (en) * | 1962-01-15 | 1964-11-17 | Paul A Bezzerides | Weeder tool |
| DK143191C (en) * | 1972-12-13 | 1981-12-14 | Kongskilde Maskinfabrik As | STUBHARVE TOOTH |
| DD130196A1 (en) * | 1977-03-30 | 1978-03-15 | Juergen Meinhardt | FEATHERING EGG FEMININE |
| DK146491C (en) * | 1981-09-24 | 1984-05-14 | Kongskilde Koncernselskab As | SPRING SCIENCE |
-
1981
- 1981-12-05 DE DE19813148260 patent/DE3148260A1/en not_active Withdrawn
-
1982
- 1982-11-19 DE DE8282110700T patent/DE3265455D1/en not_active Expired
- 1982-11-19 AT AT82110700T patent/ATE14820T1/en not_active IP Right Cessation
- 1982-11-19 EP EP82110700A patent/EP0081121B1/en not_active Expired
- 1982-12-02 DK DK534782A patent/DK534782A/en not_active Application Discontinuation
- 1982-12-03 CA CA000417001A patent/CA1197129A/en not_active Expired
- 1982-12-03 ES ES517918A patent/ES517918A0/en active Granted
- 1982-12-06 US US06/447,259 patent/US4534418A/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1757146B2 (en) * | 1967-05-05 | 1976-07-29 | Kongskilde Koncernselskab A/S, Soroe (Dänemark) | SPRING EGG TINE |
| DE6941324U (en) * | 1969-10-22 | 1970-03-19 | Heinrich Weiste & Co Gmbh Fa | SPRING TINE |
| DE7212348U (en) * | 1972-04-01 | 1972-06-29 | Rau Ohg | SOIL WORKING TOOL |
| DE7320747U (en) * | 1973-06-02 | 1973-11-22 | Steimel L | SPRING SOIL TREATMENT TOOL |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1197129A (en) | 1985-11-26 |
| DE3148260A1 (en) | 1983-06-09 |
| ATE14820T1 (en) | 1985-08-15 |
| DK534782A (en) | 1983-06-06 |
| DE3265455D1 (en) | 1985-09-19 |
| ES8307438A1 (en) | 1983-08-16 |
| EP0081121B1 (en) | 1985-08-14 |
| ES517918A0 (en) | 1983-08-16 |
| US4534418A (en) | 1985-08-13 |
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